The Economic Thresholds and Injury Levels for the English Grain Aphid, Sitobion avenae (F.) (Hemiptera- Aphididae) on Wheat Crop | ||||
Journal of Plant Protection and Pathology | ||||
Article 6, Volume 9, Issue 2, February 2018, Page 93-95 PDF (199.54 K) | ||||
Document Type: Original Article | ||||
DOI: 10.21608/jppp.2018.41254 | ||||
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Authors | ||||
A. A. Ghanim1; S. S. Awadalla1; F. E. Abd Allah2; A. A. Abdel-Aziz2 | ||||
1Economic Entomology, Faculty of Agriculture, Mansoura University, Egypt. | ||||
2Plant Protection Research Institute, Agriculture Research Center, Dokki, Egypt. | ||||
Abstract | ||||
A yield loss 28.66, 47.35, 61.77 and 79.86% caused due to introduce 1, 3, 5 and 7 individuals/ spike of aphid species Sitobion avenea Fabricius (Hemiptera- Aphididae) as abundant wheat insect pests to fifteen tillers under cages. A market price of 2017 the wheat crop (420 E.L/Aradab) and costs of control measures 90 E.L/feddan was standard, during flowering and heading stage. The calculated economic injury level (EIL) and economic threshold (ETL) in average were 7.03 and 2.26 aphid/ spike/ feddan, respectively. Calculated gain threshold was 0.21 Ardab/feddan. | ||||
Keywords | ||||
Sitobion avenea; Feddan; Ardab = 150 K.G | ||||
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